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@uiten tetraV gamut @Hita JAMES MCB-RIDE, 0F FLIN'I, MICHIGAN.

` Letters .Patent No. 73,253, dated January 14, 1868.

IMPROVEMENT IN PUMPS.

TO WHOM IT MAY CONCERN:

Be it known that I, JAMES McBRIDE, of`F1nt, in the county of Genesee,andtate of Michigan, have invented a. new and useful Self-VentilatingAnti-Freezing Pump; and I do declare that the following is a true andaccurate description thereof, reference being had to the accompanyingdrawings, andto the letters of reference marked thereon, and making apart of this specification.

Figure 1 is a front view of my invention.

`Figure 2 is a back view of the same partially in section.

Figure 3 is. a vertical sectional view of the same.

The same letters of reference indicate like parts in each figure.

The object of my invention is well explained by the name I have givenit. It is well known that the air in wells and cisterns is warmer` thanthe outer air, and that this air confined in wells and cisternsfrequently becomes foul. My invention provides a way to get rid of thisfoul air, by so constructing the pump that I leave un annular spacearound the valve-chamber, which space extends from the bottom to the topof the pump. Or, if more desirable, a series of small bores'might bemade around the pump-bore, leading from the bottom to the top of thepump.

By constructing a pump, as above described, as the warmer air in thewell o'r cistern rushes out through the annular space or through thebores, heretofore referred to, it prevents the water in the pump-chamberfrom freezing. Y

Iattach the pump-rod to the handle or lever in the ordinary manner, butI use a combined bearing and brake to attach the lever or handle to thestandard. This bearing is so constructed that it acts as a brake uponthe handle or lever, and prevents the plunger of the pump from going toofur. My invention can be attached to any pump when properly constructed,whether of wood or metal.

Having thus explained the object of my invention und its construction, Iwill now name its various parts,

i so that any one skilled in the art can manufacture it.

A is the pump-chamber; B B is the annular space or bores; C C are thevalves; D is the pump-log; E is the spout; F is-thepump-rod; G is thehandle or'levcr; His the combined bearing and brake; I is acounterbalance on the handle or lever. n

What I claim as my invention, and desire to secure by Letters Patent, is

An enclosed annular space around the pump-cylinder,deriving a supply ofair from the well, substantially as and for the purpose described.A I

JAMES McBRIDE.

Witnesses:

THos. S. SPRAGUn, GEO. RUHMNDT.A

